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我試圖顯示一個對話框,該對話框從用戶(用OK按鈕)獲取輸入,但是我用一個yes或not開頭,它不工作。這段代碼崩潰了,我不知道爲什麼。任何幫助,將不勝感激 ;)。如果你能指導我進入提示對話框,那就更酷了; p。顯示對話框片段
公共類TabFragment擴展片段{
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
new TestDialog().show(getFragmentManager(), "MyDialog");
}
}
//=============================================
public class TestDialog extends DialogFragment {
Context mContext;
public TestDialog() {
mContext = getActivity();
// Empty constructor required for DialogFragment
}
@Override
public Dialog onCreateDialog(Bundle savedInstanceState) {
AlertDialog.Builder alertDialogBuilder = new AlertDialog.Builder(mContext);
alertDialogBuilder.setTitle("Really?");
alertDialogBuilder.setMessage("Are you sure?");
//null should be your on click listener
alertDialogBuilder.setPositiveButton("OK", null);
alertDialogBuilder.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
dialog.dismiss();
}
});
return alertDialogBuilder.create();
}
發佈stacktrace – Raghunandan
以下是官方Android文檔中的DialogFragment實現示例:http://developer.android.com/guide/topics/ui/controls/pickers.html – shkschneider
AlertDialog.Builder alertDialogBuilder = new AlertDialog.Builder( mContext); 用getActivity()替換mContext。我沒有實例化對象,所以mContext爲null。 – user2241251